Tool-holder.



. E. BGWN.

Toor. Hamm,

AFPLIOATION FILED 00T. 30, 1905.

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CHARLES E. BOWN, OF BATTLE CREEK, lvllCHlfGAli, A SSG-NOR TO THE BOWN MACHINE COMPANY, LTD., F BATTLE CREEK, 'MOEIGAN No. ceases.

Application filed October 30, i985.

Specification ci' Letters Patent..

Patented Nov. 24%, 1908,

Serial No1 2E-5,133.

To all whom 'it may concer/n:

Be it known that l, CHARLES Bowls, citizen of the United States, residing at the city of Battle Creek, county: of Calhoun, State of Michigan, have invented certain new and useful Improvements in Tool-Holders, of which the following is a specification.

This invention relates to improvements in tool holders.

rl'he objects of this invention will daholder, it being shown in connection with the tool post of a lathe, and'in its operative relation to a piece of work. Fig. 2 is an enlarged detail longitudinal section, taken on a line corresponding to line 2-2 of` Figs. 1 and 3, the bar D being shown in filllines. Fig. 3 is a detail cross-section, taken on a line corresponding to line 3.,- 3 yof Fig. Fig. l-is an enlare'ed detailtalrn' on a line corresponding to line @di of Figs. land 5, the clamping screw E being shown in full lines, showing the manner of securing the tool as E at one end ot' the bar D. Fig. 5 is a detail section, taken on aline corresponding to line 5--5 of Fig. 4, the tool E and the clamping' block therefor D being shown in full lines. Fig. 6 is an enlarged detaillongitudinal section, showing a ineens for securing the tool to the bar, taken on a line corresponding to line 6-6 of Figs. 1 and 7. Fig. 7 is a detail longitudinal'section taken on a line corresponding to' line 7 7 of Fig. G, the tool, as E, being shown full lines. Fig. 8 is a perspective of the tool clam ing member d. Fig. 9 is a perspective o' the tool clamping member D.

ln the drawings, similar letters of reference refer to similar pa'rts throughout the several views, and the sectional views 'are taken looking in the direction of the little arrows at the ends of the section lines.

Referring to the drawings, A represents the tool post of a lathe.

The shank B of my improved tool holder is of any desired size or form. On its forward end is a head B arranged at right angles thereto. This head has a hole long itudinally therethrough, which hole has an expanded cone-like portion at one end, and preferably a portion of even. diameter at the other end.

Vlthin the head B is a shelldilre clamping member G. 'lf'liis i'neinber C has a conical portion to lit the conical portion or" the head. This conical portion oi' the clamping member is slitted at c. The clamping .meinber C is threaded to receive the nut C which bears against the end of the head. Bytightening this nut, the member C is drawn into the head, thereby clamping it upon the bar as The slitted end of the clamping member C is also preferably threaded to receive a nut as C which. bears against the end of the head B, so that the member C can bedrawn out from thel head to release Vthe bar, it, only being necessary to` ease ofi? the clamping nut C and tightening the nut C.

lt is evident that the bar C can be very securely clamped in this manner and that the adjustment may be very quickly made. The structure is very strong and is particulariy adapted for heavy work, although it is desirable for any work where such a` holder is applicable.

The bar D is iroiierably a straight har of even diameter from end to end. (,)ne end of the bar D has a slot-like opening therethrough, the forward wall of which is forwardly inclined. This forms a seat for the tool, the tool resting against the inclined wall of the slot. The tooll E is clamped in its adjusted position in the slot by the clamping block D and the clamping screw D'. The clamping 'block D' is adapted to it into the sl'ot behind the tool, the block being wedge shape.

The screw D is arranged transversely through the har at the rear of the clamping block, and is provided with a conical portion which en'ages on the tapered groove formed in the rear edge of the wedge block D, so that by means of the screw, the wedge block is forced upon the tool to clamp 1t. The other end of the bar is provided with a Atransverse hole therethrough. The tool, as

E, is inserted through this opening and is clamped therein by the clamping member d.

'This clamping member is provided with i11- wardly projecting lugs d,-see Fig. 8#- which project into the hole, and engage the tool arranged therein. The bar D is suitably notched to receive the lugs.

The clamping member al which is washerlike in form, is arranged upon the threaded projection d. With the tool as E arranged through the bar, the clamping member d is forced against' it to clamp it in the bar by means of the nut D". By this arrangement, the tool is held in a very secure and rigid manner. It is evident that the clamping means is very simple, economical, and durable in use. By thus forming the bar, the tool may be changed from end to end as desired, according to whether it is desired 'to hold the tool at right angle\to the bar or ferred by me on account of structural simplicity and economy and convenience in manipulation. However,`I am aware that it is capable of considerable variation in structural details without departing from my invention.

.I-Iaving thus described my invention, what I claim as new and desire to secure by Letters Patent, is: l

l. In a tool holder, the combination of a shank, having a head with a longitudinal hole therethrough, said hole having a portion of uniform diameter at. one end, and an expanding cone-like portion towards the other; a clamping member adapted to receive a tool bar or shank, having threads at each eoaeoa end, and having a portion of uniform diameter at one end, and a longitudinally slotted expanding cone-like portion towards the other, arranged in said head; and nuts for each end of said clamping member, arranged to bear against the ends of said head, for the purpose specified. '1

2. In a tool holder, the combination of a shank, having a head with a longitudinal hole therethrough, said hole having a p0rtion of uniform diameter at one end, and

an expanding cone-like portion towards the portion towards the other, arranged in said head; and a nut threaded upon said clamping member for drawing it into said head, for the purpose specied. 4

3. In a tool holder, the combination of a shank, having a head with a longitudinal cone-shaped hole therethrough; a clamping member adapted to receive a tool bar or shank, having threads at each end, and having a longitudinally slotted cone-shaped portion arranged in said head; and nuts for each end of said clamping member arranged to bear against the ends of said head, for the purpose specified. y

In witness whereof, I have hereunto set my hand and seal in the presence of two. witnesses.

CHARLES E. BOWN. [Ls] Witnesses:

FRANCIS A. IIULP, JENNiE IRENE KUL?, 

